How we keep the board fair
The winner really won: every run in our games is replayed by our server, from the player's own button presses, before its time goes on the board.
How does it work?
- While you play, the game records the moments you press and release the button, and sends those with your time.
- The game's physics runs at 120 steps a second and gives exactly the same result on every phone, computer and on our server.
- Our server drives your button presses again. If the time it gets doesn't match yours, the run doesn't count.
- Exceptionally fast times wait for a person to check them before they go on the board.
What does it stop?
- Typing in a fake time, or changing a time on its way to the board.
- A time the game couldn't really have produced.
What doesn't it stop?
A computer program that plays the game very well. In a one-button game, a script can find a near-perfect run. So when there's a prize, we don't give it to whoever tops the board: we use a target-time draw with one entry per person, or a live final on the day, and we watch the winning run first (competition games).
What else does it give us?
Because every run is stored as button presses, any run can be replayed as a ghost: a replay of that run that races alongside you on the track. That's how Quali Prix players race their friends, and how we can show anyone exactly how a winning time was set.
Where is it running?
In Quali Prix, on every board (27 Oct 2026). Play Quali Prix